Weinrib appeared on The Dick Van Dyke Show three times, each time playing a similar character, a loud, over-the-top, insult-type Comedian. This character was named "Jackie Brewster" ("Buddy Can You Spare a Job", 1961), "Danny Brewster" ("The Sam Pomerantz Scandals", 1963), and "Phil Franklin" ("The Impractical Joke", 1965).
A native of the Bronx, Weinrib got his start in show Business working with Spike Jones, then later in The Billy Barnes Revue. He made guest appearances on The Dick Van Dyke Show, The Many Loves of Dobie Gillis, Burke's Law, The Munsters, Happy Days and Adam-12. He charted nationally (Music Vendor, #132) with the comedy single "Prez Conference" in 1962. He also guest starred in an Emergency! episode called "Firehouse Four" as Fred Gibson, an overweight, accident-prone man. Woody Allen's character in his 1995 film Mighty Aphrodite was named "Lenny Weinrib."
Weinrib's directing career consists of three feature films, all in the beach party genre: Beach Ball for Paramount in 1965, and Wild Wild Winter and Out of Sight, both for Universal in 1966. Weinrib also co-wrote the 1963 joke book The Elephant Book.
He also appeared on single episodes of The Man From U.N.C.L.E. ("Winky Blintz" in "The Off-Broadway Affair", 1966) Happy Days ("Duke" in "Ritchie's Cup Runneth Over", 1974), and on two episodes of Adam-12 in 1973 and 1974 as a police garage mechanic. He guest starred in a 1974 episode of Emergency! called "Firehouse Four" as Fred Gibson.
He voiced the title role in H.R. Pufnstuf throughout the show's entire run from 1969 through 1971, and also wrote every episode of the series. He also appeared as H.R. Pufnstuf as a guest on The Dating Game in Christmas 1972 and on one episode of the TV show CHiPs in 1977. On The Krofft Supershow he played the title character in Magic Mongo.
He also lent to voice to Superman in 1970 for a Sesame Street Sketch of a lecture about words beginning with "S" which happened to be the character's favorite letter of the Alphabet.
He did the voices for Moonrock and Sergeant Boulder on The Flintstone Comedy Show. In 1986, he was the original voice of Freddy Flintstone on The Flintstone Kids, before Scott Menville replaced him the following season. In 1991, he voiced Max the Mole on the all-star Hanna-Barbera animated series Yo Yogi!.
Weinrib retired from acting in the 1990s and moved to Santiago, Chile.
Weinrib died in a hospital near his home on June 28, 2006, after suffering a stroke.
